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Plesovice zircon :
Plesovice zircon : A new natural reference material for U-Pb and Hf isotopic microanalysis
- Artikel/kapitelEngelska2008
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Elsevier BV,2008
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printrdacarrier
Nummerbeteckningar
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LIBRIS-ID:oai:DiVA.org:su-58577
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https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-58577URI
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https://doi.org/10.1016/j.chemgeo.2007.11.005DOI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:ref swepub-contenttype
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Ämneskategori:art swepub-publicationtype
Anmärkningar
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authorCount :14
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Matrix-matched calibration by natural zircon standards and analysis of natural materials as a reference are the principle methods for achieving accurate results in inicrobeam U-Pb dating and Hf isotopic analysis. We describe a new potential zircon reference material for laser ablation ICP-MS that was extracted from a potassic granulite facies rock collected in the southern part of the Bohemian Massif (Plesovice, Czech Republic). Data from different techniques (ID-TIMS, SIMS and LA ICP-MS) and several laboratories suggest that this zircon has a concordant U-Pb age with a weighted mean Pb-206/U-238 date of 337.13 +/- 0.37 Ma (ID-TIMS, 95% confidence limits, including tracer calibration uncertainty) and U-Pb age homogeneity on the scale used in LA ICP-MS dating. Inhomogeneities in trace element composition due to primary growth zoning prevent its use as a calibration standard for trace element analysis. The content of U varies from 465 ppm in pristine parts of the grains to similar to 3000 ppm in actinide-rich sectors that correspond to pyramidal faces with a high degree of metamictization (present in ca. 30% of the grains). These domains are easily recognized from high intensities on BSE images and should be avoided during the analysis. Hf isotopic composition of the Plesovice zircon (>0.9 wt.% Hf) is homogenous within and between the grains with a mean Hf-176/Hf-177 value of 0.282492 +/- 0.000013 (2SD). The age and Hf isotopic homogeneity of the Plesovice zircon together with its relatively high U and Pb contents make it an ideal calibration and reference material for laser ablation ICP-MS measurements, especially when using low laser energies and/or small diameters of laser beam required for improved spatial resolution.
Ämnesord och genrebeteckningar
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zircon reference material
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laser ablation ICP-MS
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Plesovice
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U-Pb dating
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Hf isotopes
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Bohemian Massif
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NATURAL SCIENCES
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NATURVETENSKAP
Biuppslag (personer, institutioner, konferenser, titlar ...)
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Kosler, Jan
(författare)
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Condon, Daniel J.
(författare)
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Crowley, James L.
(författare)
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Gerdes, Axel
(författare)
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Hanchar, John M.
(författare)
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Horstwood, Matthew S. A.
(författare)
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Morris, George A.Stockholms universitet,Institutionen för geologi och geokemi
(författare)
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Nasdala, Lutz
(författare)
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Norberg, Nicholas
(författare)
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Schaltegger, Urs
(författare)
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Schoene, Blair
(författare)
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Tubrett, Michael N.
(författare)
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Whitehouse, Martin J.
(författare)
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Stockholms universitetInstitutionen för geologi och geokemi
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Chemical Geology: Elsevier BV249:02-jan, s. 1-350009-25411872-6836
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Slama, Jiri
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Kosler, Jan
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Condon, Daniel J ...
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Crowley, James L ...
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Gerdes, Axel
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Hanchar, John M.
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Horstwood, Matth ...
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Morris, George A ...
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Nasdala, Lutz
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Norberg, Nichola ...
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Schaltegger, Urs
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Schoene, Blair
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Tubrett, Michael ...
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Whitehouse, Mart ...
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Chemical Geology
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Stockholms universitet